Hotfix/api predictor (#13383)

* hotfix for PaddleTensor buffer.

Author: Superjomn

paddle/fluid/inference/api/api.cc

@@ -9,8 +9,8 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License. */
 
-#include <glog/logging.h>
 #include "paddle/fluid/inference/api/paddle_inference_api.h"
+#include "paddle/fluid/platform/enforce.h"
 
 namespace paddle {
 
@@ -64,13 +64,15 @@ PaddleBuf& PaddleBuf::operator=(PaddleBuf&& other) {
 
 void PaddleBuf::Resize(size_t length) {
   // Only the owned memory can be reset, the external memory can't be changed.
-  if (length_ == length) return;
+  if (length_ >= length) return;
   if (memory_owned_) {
     Free();
+    data_ = malloc(length);
+    length_ = length;
+    memory_owned_ = true;
+  } else {
+    PADDLE_THROW("The memory is allocated externally, can not Resized");
   }
-  data_ = new char[length];
-  length_ = length;
-  memory_owned_ = true;
 }
 
 void PaddleBuf::Reset(void* data, size_t length) {
@@ -82,8 +84,8 @@ void PaddleBuf::Reset(void* data, size_t length) {
 
 void PaddleBuf::Free() {
   if (memory_owned_ && data_) {
-    assert(length_ > 0);
-    delete[] static_cast<char*>(data_);
+    PADDLE_ENFORCE_GT(length_, 0);
+    free(static_cast<char*>(data_));
     data_ = nullptr;
     length_ = 0;
   }